Unit8__情态动词表推测精讲练

1、Unit8 情态动词表推测精讲练1.must表示说话人对事物的推测的可能性的程度非常大，含有“一定；准是”的意思。“must be+表语”表示对现在情况的推测，意为“一定”。“must be+现在分词”表示对说话瞬间（或现在）情况的推测，意为“一定正在”。“must +have+过去分词”表示对过去或已完成事情的推测，意为“一定”。He must be in the office now. 他现在准在办公室。She must be cooking now because I can smell something delicious. 她一定在做饭，因为我闻到了香味。He must have

2、finished his homework yesterday. 他昨天肯定完成了作业。2.may表示推测，语气没有must强，意为“也许；或许”，may not意为“也许不”。might是may的过去式，表示说话人对现在或将来不太确定的可能性的推测。Excuse me. Could you tell me the way to the library?请问，你能告诉我去图书馆的路吗？Ask the policeman. He may know. 问问那个警察吧，他可能知道。She is coming to us. She might be our new teacher. 她正朝我们走来，她

3、可能是我们的新老师。3.can 表示推测时，常用于否定句或疑问句中，cant意为“不可能”。“can/cant+表语”表示对现在情况的推测，意为“（不）可能”。could是can的过去式，表示说话人对事物 的推测，可能性比can小，语气较委婉。Listen. Carol is singing in the next room. 听，卡罗尔正在隔壁唱歌。Its cant be her. She has gone to Beijing. 不可能是她，她去北京了。It could rain tomorrow, but there is no cloud in the sky today. 明天可能会

4、下雨，但今天天上没有一点云彩。典例题解例1Whats Tom going to do next Sunday?Im not sure. He _go to the country to see his uncle. A. can B. must C. will D. may解析D。can 意为“能，会”，must是“一定”，will意为“将，会”，may意为“可能”。根据Im not sure可知道选D。C项与Im not sure矛盾。例2Whose magazine is this?It _Carols. It has name on it. A. might be B. cant be

5、C. could be D. must be解析D。由It has her name on it.可知猜测是肯定的，应用must be。A和C表示不太肯定，B表示“不可能”。例3 Jill looks so painful, there _ the something wrong with her. - Oh dear! Wed better take her to the nearest hospital at once. A. can B. should C. would D. must解析D。由Jill looks so painful确定选D，此处的must意为“必定；准是”，表示我们

6、对某事确有把握，有很大可能性。例4You _ be tired after working for eight hours without a rest.A. can B. may C. must D. need 解析C。从after working for eight hours without a rest可知是表示猜测，意为“一定是；肯定是”，故选C。例5-Are you going to Beijing by plane?-Its fast ,but expensive. So I am not sure. I_ take a train. A. should B. may C. mu

7、st D. will解析B。由So I am not sure.可知说话者表示“可能”的意思，故选B。语法精练 I. 选择填空。1.一Excuse me，is this the right way to No. 1 Middle School?Sorry，I'm not sure. But it be. A. can B. need C. must D. may2. Listen! Is that Kate playing the piano in the room?No. It be Kate. She has gone to London. A. may not B. neednt

8、 C. mustnt D. cant3. Is your brother playing computer games, Ted?- He _ do that because the computer doesnt work. A. may not B. cant C. mustnt D. neednt 4. David, is that man your head teacher? - It _ be him. Hes the tallest in our school.A. mustnt B. cant C. neednt D. wont 5. Is Simon coming by tra

9、in? He should, but he _ not. He likes driving his car. A. may B. shall C. need D. must6. Where is Mr. Smith? Have you seen him?- He _ be in his office. -He _ be in his office, for I left there just now. A. may, cant B. can, may not C. may, mustnt D. can, dont have to II.选用适当的情态动词填空。mustnt, may, coul

10、d, neednt, cant, might, have to, can, must 1.May I come in, Mr Smith?” Sorry, you _. Please wait a moment. 2.Its late. I _ go home now. 3.Could I have a look at the photo of your family, Sam?Of course you _. 4.Would you like to go swimming with me this afternoon?Id love to, but Im afraid I _. I have

11、 a lot of work to do. 5.Its dangerous. You _ play soccer on the road. 6._ I speak to Miss Guo, please?Speaking. 7._ I fill in the check-in form right now, sir?No, you _. You can complete it this afternoon. 8.Who is the man over there? Is it Mr Wang?No, it _be him. Mr Wang is much taller. 9.The white purse _ be Jennys or Susans. They both like wh